|Diabetes and its complications can affect many parts of the eye. Diabetes can cause changes in nearsightedness, farsightedness, and premature presbyopia. It can result in cataracts, glaucoma, a lack of eye muscle coordination (strabismus), and in decreased corneal sensitivity. Visual symptoms of diabetes include fluctuating or blurred vision, occasional double vision, loss of visual field and flashes and floaters within the eyes. Sometimes these early signs of diabetes are first detected in a thorough eye examination by your eye doctor. The most serious eye problem associated with diabetes is diabetic retinopathy which occurs when there is a weakening or swelling of the tiny blood vessels in the retina of your eye, resulting in blood leakage, the growth of new blood vessels and other changes. Early detection is critical because if untreated, blindness can result. During your routine visit, the doctor can diagnose potential vision threatening changes in your eye that can be treated to prevent blindness.